如何重新取样与白色背景,在c#preferable图像方,填充不使用任何第三方库(.NET框架只)?
How to resample an image to square, padding with white background in c# preferable without using any 3rd party libraries (.Net framework only)?
谢谢!
这其实是可以轻松完成pretty的。
This can actually be done pretty easily.
public static Image PadImage(Image originalImage)
{
int largestDimension = Math.Max(originalImage.Height, originalImage.Width);
Size squareSize = new Size(largestDimension, largestDimension);
Bitmap squareImage = new Bitmap(squareSize.Width, squareSize.Height);
using (Graphics graphics = Graphics.FromImage(squareImage))
{
graphics.FillRectangle(Brushes.White, 0, 0, squareSize.Width, squareSize.Height);
graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
graphics.DrawImage(originalImage, (squareSize.Width / 2) - (originalImage.Width / 2), (squareSize.Height / 2) - (originalImage.Height / 2), originalImage.Width, originalImage.Height);
}
return squareImage;
}